In a battle of US Open champions, No.17 seed Emma Raducanu needed three sets to overcome Sloane Stephens in the first round of the Australian Open.
Three years ago at Melbourne Park, Murray caught everyone by surprise by tearfully announcing he feared his career was coming to an end.
Aryna Sabalenka had to dig deep in her first round Australian Open encounter against Storm Sanders, eventually winning 7-5, 6-3, 6-2.
Naomi Osaka easily made it through to the second round of the Australian Open with a straight sets win over Camila Osorio on Monday (January 17).
Rafael Nadal beat Marcos Giron 6-1, 6-4, 6-2 to ease through to the second round of the Australian Open on Monday (January 17).
When returning to form in December, Nadal had tested positive for COVID-19, keeping him away from the practice court.
A federal court on Sunday upheld the Australian immigration minister cancelling the visa for Novak Djokovic, meaning he will be deported.
Andy Murray lost to Aslan Karatsev in the final of the Sydney Tennis Classic 6-3, 6-2 as his two-year wait for an ATP title goes on.
Kasatkina will next take on No.5 seed Paula Badosa, who overcame Belinda Bencic 7-6, 3-6, 6-3 in 2 hours and 35 minutes.
For the first time in five meetings, Jabeur managed to get one past the two-time Wimbledon champion.